Airtac JSI Series Standard Cylinder JSI63X25
The AirTAC Airtac JSI Series Standard Cylinder JSI63X25 is a genuine double acting JIS-standard air cylinder with a Ø63mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ63 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM18×1.5
- CushionAdjustable, 29 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSI Series Standard Cylinder JSI63X25
Generating 1559 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable machine space by being shorter and more compact than an ISO 15552 cylinder of the same 63 mm bore. The extruded hard-anodized aluminum barrel eliminates external rods to resist wear, while the two-way piston seal retains grease for long, low-friction life. It uses a G3/8 port and an M18x1.5 rod thread.
For practical sizing, plan for about 935 N of real work at 0.5 MPa, which safely lifts roughly 79 kg vertically with a 2:1 margin. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches; order the -S variant if you need drop-in side-groove sensing. The adjustable 29 mm air cushions at both ends smoothly decelerate the piston near stroke end.
Airtac JSI Series Standard Cylinder JSI63X25 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI63X25 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M18×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSI Series Standard Cylinder JSI63X25
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSI Series Standard Cylinder JSI63X25 Is Used
Short-Stroke Clamping
Ideal for holding aluminum extrusions in a machining fixture, using the 1559 N push force to lock parts firmly for milling operations.
Package Diverting
Provides a fast 25 mm jab to push small cartons off a packaging line, benefiting from the 30-800 mm/s speed range and compact profile.
Pallet Stopper Gate
Acts as a high-strength stop pin for pallets on a roller conveyor, withstanding impacts while fitting into tight transfer station gaps.
Is the Airtac JSI Series Standard Cylinder JSI63X25 the Right Cylinder?
If 1559 N at 0.5 MPa is too much force, step down to the JSI50X25 which offers 982 N; if you need more power, the JSI80X25 provides 2513 N. This 25 mm stroke is very short, so side-load bending stress is minimal. Keep in mind the standard JSI does not hold its load when air is lost or the valve is centered, as the piston will drift and the cushion only decelerates near the end of travel. For a held load, install an external rod lock or a pilot-operated check valve. Mounting options include LB foot, FA/FB flange, CA/CB/CR clevis, and TC/TCM1/TCM2 trunnion.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSI Series Standard Cylinder JSI63X25 FAQ
The JSI63X25 delivers 1559 N push and 1402 N pull at 0.5 MPa, or 2182 N push and 1962 N pull at 0.7 MPa. The theoretical maximum force is 318 kgf at 1.0 MPa. It uses a G3/8 air port.
No, this specific SKU does not include a magnet, so it cannot accept CMSE or DMSE switches. You must order the JSI63X25-S variant to enable drop-in magnetic sensing via the side grooves.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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